双螺杆空压机气动噪声的数值模拟研究  

Numerical Simulation Research on Aerodynamic Noise of Twin Screw Air Compressor

作　　者：肖聪聪 何亚银[1] 赵永强[1] 李志峰[1] 王军利[1] XIAO Congcong;HE Yayin;ZHAO Yongqiang;LI Zhifeng;WANG Junli(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong Shaanxi 723001,China)

机构地区：[1]陕西理工大学机械工程学院,陕西汉中723001

出　　处：《机床与液压》2021年第21期175-179,共5页Machine Tool & Hydraulics

基　　金：陕西省科技厅重点研发项目(2017ZDXM-GY-138);陕西理工大学人才启动项目(SLGQD1811)。

摘　　要：为了研究双螺杆空压机内气动噪声的大小与分布规律,建立双螺杆转子的三维模型与空压机的流场模型。将流体动力学计算方法和声学有限元技术相结合,研究转子中心距和齿顶间隙对双螺杆空压机宽频噪声的影响。结果表明:双螺杆空压机进气口边缘处声功率级最低,与进气口接触且逐渐接近转子容积部分声功率级较低,而转子啮合部和排气口位置的声功率级最大,且宽频噪声的大小随着压力差增大而增大;当齿顶间隙为0.2 mm时,空压机的宽频噪声较小;转子中心距为81.2 mm时,空压机的宽频噪声较小。In order to study the size and distribution of aerodynamic noise in a twin-screw air compressor, a three-dimensional model of the twin-screw rotor and a flow field model of the air compressor were established. Combining fluid dynamics calculation method with acoustic finite element technology, the influence of rotor center distance and tooth tip clearance on broadband noise of twin-screw air compressor was studied. The results show that the sound power level at the edge of the air inlet of the compressor is the lowest;the sound power level of the part in contact with the air inlet and gradually approaching the volume of the rotor is lower, while the sound power level of the rotor meshing part and the air outlet is the largest;the magnitude of broadband noise increases as the pressure difference increases;when the tooth tip clearance is 0.2 mm, the broadband noise of the air compressor is smaller;when the rotor center distance is 81.2 mm, the broadband noise of the air compressor is smaller.

关 键 词：双螺杆空压机 气动噪声 齿顶间隙 螺杆中心距 

分 类 号：TH455[机械工程—机械制造及自动化]